Level4 Unit1 Part2 Science
-A force is a push or a pull on an object.
-A force changes the motion of a moving object. motion: the act or process of moving
-A force can be strong or weak, and it always has a direction. weak: adj. the opposite of strong or without much power
-The Earth is a planet that goes around the sun in a circular ['sɝkjəlɚ] orbit ['ɔrbɪt] .
-The speed of its motion doesn't change， but the direction of its motion does.
-The Earth has a layer [ˈler] of gas above its surface, which helps to support life.
-Atoms are the building blocks of matter.
-At the center of an atom is its nucleus ['nuklɪəs] , which has a positive electric [ɪ'lɛktrɪk] charge.
-Outside the nucleus are electrons [ɪ'lɛktrɑn], which have a negative ['nɛɡətɪv] charge.
-Asteroids 行星遊戲名 and comets 彗星 are object that orbit our Sun but are smaller than planets.
-Asteroids that pass close to the Earth are called near-earth objects.
-The layer of gasses just above Earth's surface is our atmosphere ['ætməsfɪr] 大氣層.
-The atmosphere is made up of gass such as oxygen ['ɑksɪdʒən] 氧 and nitrogen ['naɪtrədʒən] 氮.
-Without an atmosphere, there would be no life on Earth.
Level4 Unit1 Part2 Geomety
-The two lines on the left intersect each other at a right angle, which is 90 degrees.
-The two lines on the right are parallel which means never cross.
-The adjacent sides of a rectangle are perpendicular, which means they meet at a 90-degree angle.
-The opposite sides of rectangle are equal and parallel,which means they never cross.
-The area of a rectangle is the length times the width.
-A circle is a 2 dimensional figure with a radius and a circumference,which a radius and a circumference, which is the distance around the circle.
-The area of a circle is pi r squared, where r is the radius and pi is the ratio of a circle's circumference to its diameter.
-A sphere is a three dimensional figure with a radius and a volume, which is 4/3 pi r cubes.
-All points on the surface of a sphere are equidistant from its center.
-A right triangle is a 2 dimenssional figure with 4 sides, two of which are perpendicular.
-To find its area, multiply the lengths of the two perpendicular sides, a and b, and divide by two.A=1/2 ab.
Level4 Unit1 Part2 Dinner Conversation
-Have you filished eating yet? -No. I haven't, why are you in such hurry.
-I'm sorry, but you are such slow eater.
-A slowly eater ? well, I try to enjoy my food , you just eat ,I don't see how you can even taste it
- ok. I'm sorry ,
-no, go ahead,
-I've been getting some strange emails from my boss.
-Is business bad
-yes it is ,but i dont want to talk about is
-but i'm a good listener
-you can tell me , if you'd like to.
-thanks , may be some other time
-I don't know what i would do without you.
-I thought we have relaxing eveling